BBC America has been running a Dr. Who marathon.
I just saw the episode The Doctor’s Daughter, which had Georgia Moffett starring as Jenny the daughter (clone) of the Doctor.
Ms. Moffet is the daughter of the 5th Doctor, Peter Davison. (Davison is his stage name, his birth name is Moffatt)
She co-starred with David Tennant, who played the 10th Doctor.
Tennant and Moffett later had a daughter (2 actually, as well as 2 sons).
This is profoundly weird.